click on the greasemonkey icon (a monkey face) bob will have a check next to it. you can click to uncheck and bob will be disabled. I believe you can also uninstall from that screen its been a while since i used firefox.

gawddog, if you are using chrome, you may have to delete the BOB plug in, install Tampermonkey, then reinstall the latest BOB version (5.2.4 - here http://userscripts.org/scripts/show/52341) then allow tampermonkey to install it.Seems to be working for me.I rely on BOB, so having it working is essential...

Gendotte - you can turn off the confirmations from the BOB menu. Under 'Confirmations' Must be done from inside a game....Hope that helps.